Weather Forecast for Local Aviation

I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING SHOWERS AND
     THUNDERSTORMS TO GUANGDONG. THE TROUGH OF LOW
     PRESSURE IS EXPECTED TO MOVE NORTHWARDS
     GRADUALLY AWAY FROM THE COASTAL AREAS.
     MEANWHILE, A SOUTHERLY AIRSTREAM IS AFFECTING
     THE SOUTH CHINA COASTAL AREAS.
     AT 11 P.M., TROPICAL STORM CHOI-WAN WAS LOCATED
     NEAR 14.4 DEGREES NORTH, 120.6 DEGREES EAST. IT
     IS FORECAST TO MOVE NORTH OR NORTH-NORTHWEST AT
     ABOUT 12 KNOTS ACROSS THE PHILIPPINES.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND (DIRECTION/KNOT)          TEMPERATURE (DEG. C)
   A.   SURFACE:  200/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  200/10-15                            28-33
   B.   2000 FT:  200/10-15                            24
   C.   5000 FT:  220/15                               20
   D.  10000 FT:  220/15                               13
   E.  18000 FT:  260/15                               MS1
   F.  24000 FT:  260/10                               MS11
   G.  30000 FT:  240/10                               MS22
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY. A FEW SHOWERS AND ISOLATED
      THUNDERSTORMS. SUNNY PERIODS DURING THE DAY
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT SCT 3000 FT
      TEMPO FEW CB 1000 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS.
     SUNNY PERIODS WITH ISOLATED SHOWERS AND
     THUNDERSTORMS.=

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Note: The forecast could be updated before the next issue time 
whenever there is newly expected occurrence or non-occurrence 
of significant weather as described below which may be hazardous 
to aircraft within 100-km radius of Hong Kong:

(a) Change of the tropical cyclone category
(b) Strong, Gale, Storm, and Hurricane force winds
(c) Thunderstorm/CBs
(d) Severe gusts
(e) Severe turbulence
(f) Significant low stratus
(g) Fog or thick haze/sandstorm/duststorm 
    causing significant reduction of visibility
(h) Volcanic ash
(i) Radioactive cloud
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Aviation Weather Observation and Forecast Information for Hong Kong International Airport

To know more about clouds, please see Commonly observed clouds in Hong Kong.